Stanodrol is 3-beta-hydroxyetioallocholan-17-one

MMV3 is 3-alpha-hydroxyetioallocholan-17-one

My question is how much of a difference are these two? What does the alpha or beta mean and does it make a difference?

I recently got a couple bottles of MMV3 off a trade I did with a friend and was wondering if this is actually a PH thats worth taking or not. The fact that it is from LG makes me skeptical and think it is just some hyped up bunk like M1D

Thanks everyone